From 7de9b48c69bb86619278f4bec7a53cd26745dd05 Mon Sep 17 00:00:00 2001
From: Wvader <34067397+wvader@users.noreply.github.com>
Date: Mon, 22 Aug 2022 03:14:14 +0100
Subject: [PATCH] Inject empty constructor

---
 src/BlueWest.MapTo/Extensions/CommonSource.cs | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/src/BlueWest.MapTo/Extensions/CommonSource.cs b/src/BlueWest.MapTo/Extensions/CommonSource.cs
index 92434e8..4553839 100644
--- a/src/BlueWest.MapTo/Extensions/CommonSource.cs
+++ b/src/BlueWest.MapTo/Extensions/CommonSource.cs
@@ -32,6 +32,7 @@ namespace MapTo.Extensions
                 .WriteOpeningBracket()
                 .WriteLine()
                 // Class body
+                .GeneratePublicEmptyConstructor(model, ref constructorHeaders, true)
                 .GeneratePublicConstructor(model, ref constructorHeaders)
                 .GeneratePublicConstructor(model, ref constructorHeaders, true);
             
@@ -112,6 +113,40 @@ namespace MapTo.Extensions
             return builder;
         }
 
+        private static SourceBuilder GeneratePublicEmptyConstructor(this SourceBuilder builder, MappingModel model, ref List<string> constructorHeaders, bool filterNonMapped = false)
+        {
+            const string mappingContextParameterName = "context";
+
+            foreach (var targetSourceType in model.MappedSourceTypes)
+            {
+                var baseConstructor = /*model.HasMappedBaseClass ? $" : base({mappingContextParameterName}, {sourceClassParameterName})" :*/ string.Empty;
+                
+                var constructorHeader =
+                    $"public {model.TypeIdentifierName}(){baseConstructor}";
+
+
+                bool hasAlreadyConstructor = false;
+                
+                foreach (var header in constructorHeaders)
+                {
+                    if(constructorHeader.Contains(header)) hasAlreadyConstructor = true;
+                }
+
+                if (hasAlreadyConstructor) continue;
+
+                constructorHeaders.Add(constructorHeader);
+                
+                builder
+                    .WriteLine(constructorHeader)
+                    .WriteOpeningBracket()
+                    .WriteClosingBracket()
+                    .WriteLine();
+            }
+
+            // End constructor declaration
+            return builder;
+        }
+
         private static bool IsMappedProperty(this System.Collections.Immutable.ImmutableArray<MappedMember> properties, MappedMember property)
         {